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buildah-unshare(1) General Commands Manual buildah-unshare(1) NAME buildah-unshare - Run a command inside of a modified user namespace. SYNOPSIS buildah unshare [options] [--] [command] DESCRIPTION Launches a process (by default, $SHELL) in a new user namespace. The user namespace is configured so that the invoking user's UID and pri- mary GID appear to be UID 0 and GID 0, respectively. Any ranges which match that user and group in /etc/subuid and /etc/subgid are also mapped in as themselves with the help of the newuidmap(1) and newgidmap(1) helpers. buildah unshare is useful for troubleshooting unprivileged operations and for manually clearing storage and other data related to images and containers. It is also useful if you want to use the buildah mount command. If an unprivileged user wants to mount and work with a container, then they need to execute buildah unshare. Executing buildah mount fails for un- privileged users unless the user is running inside a buildah unshare session. OPTIONS --mount, -m [VARIABLE=]containerNameOrID Mount the containerNameOrID container while running command, and set the environment variable VARIABLE to the path of the mountpoint. If VARIABLE is not specified, it defaults to containerNameOrID, which may not be a valid name for an environment variable. EXAMPLE buildah unshare id buildah unshare pwd buildah unshare cat /proc/self/uid_map /proc/self/gid_map buildah unshare rm -fr $HOME/.local/share/containers/storage /run/user/`id -u`/run buildah unshare --mount containerID sh -c 'cat ${containerID}/etc/os- release' If you want to use buildah with a mount command then you can create a script that looks something like: cat buildah-script.sh << _EOF #!/bin/sh ctr=$(buildah from scratch) mnt=$(buildah mount $ctr) dnf -y install --installroot=$mnt PACKAGES dnf -y clean all --installroot=$mnt buildah config --entrypoint="/bin/PACKAGE" --env "FOO=BAR" $ctr buildah commit $ctr imagename buildah unmount $ctr _EOF Then execute it with: buildah unshare buildah-script.sh SEE ALSO buildah(1), buildah-mount(1), namespaces(7), newuidmap(1), newgidmap(1), user_namespaces(7) buildah June 2018 buildah-unshare(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLE | SEE ALSO
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